- Define Electrical Engineering?
Electrical engineering is the branch of engineering that studies and applies electricity, electronics, and electromagnetism.
- Explain Quality Assurance Engineering.
QA Engineering assists various software development teams with responsibilities such as application creation, application testing, implementation, and debugging, essentially being involved in the development process from start to finish.
- How can you tell a circuit is inductive, capacitive, or merely resistive?
The circuit’s total impedance can be utilised to identify it. It is an inductive circuit if the imaginary component of the total impedance is positive. If the imaginary component is negative, the circuit is capacitive. If it is zero, the circuit is completely resistive.
- Why should the secondary of a current transformer be closed when current flows through its primary?
On the secondary side, the current transformer is essentially a step-up transformer that increases the voltage while decreasing the current. When the secondary is open, the primary current becomes the magnetising current, generating an extremely high secondary voltage that might damage the insulation and endanger personnel.
- Define ITP?
All inspections must be performed in accordance with an approved ITP (Inspection Test Plan), which includes the following sections:
- Activity Description Responsible Person Quality Inspection Drawings and Specifications
- ITRs are Acceptance Criteria Verifying Documents.
- Intervention Strategies
- Which types of inspections have you undertaken on electrical work?
Installation of Power Control and Earthing Cables, LV/MV Switchgear, Transformer Installation, Power Distribution Boards Installation, UPS Panel and Battery Installation, Earthing System Installation, Lighting System Installation, Motors Solo Run & Installation Check, and CP System Installation, among other things.
- Describe the differences between a test plan and a test strategy.
The test plan shows how testing is done for a specific application within a project, whereas the test strategy is handled by a higher authority, such as the project manager, and shows the overall testing of the work at hand.
- What are the methods to achieve Cathodic Protection?
Cathodic Protection (CP) can be accomplished in two ways. Using an impressed current from an electrical source, or using sacrificial anodes.
- Define IP rating?
IP stands for Ingress Protection, and it classifies and rates the degree of protection provided by mechanical casings and electrical enclosures against intrusion (body parts such as hands and fingers), dust, accidental contact, and water.
- What should we look for when loop testing a control valve?
We must take heed of the following readings:
- Output from the controller.
- Output of an I/P Converter
- Output of a Valve Positioner
- Position of the Valve
- What does the drain/shield function in instrumentation wires serve?
To avoid unwanted signal distribution, electrostatic noise should be avoided.
- What is electric traction?
Electric traction is the electric power using for traction system such as railways, trolleys, trams etc.
- What are the differences between functional and non-functional testing?
Functional testing is concerned with the application’s functional requirements. This sort of testing examines whether the system responds to orders, requirements, and specifications.
Non-functional testing does not focus on the app’s main requirement; it is permitted to focus on other surrounding factors such as the app’s performance and load; it is not stated requirement-based but has its own requirements in the part of quality standards. As a result, as a Quality Assurance Engineer, it is your responsibility to guarantee that these tests are likewise given adequate time and attention.
- What are the advantages of electric traction?
- Less starting time
- Low maintenance and cost
- High torque while starting
- High traffic handling capacity
- Need less terminal space
- Regenerative braking is possible
- Define electric drive?
Electric drive refers to the combination of an electric motor, an energy transmission shaft, and a motion control device.
- What is a motor starter?
A motor starter is a device that connects in series with the motor to reduce the starting current (which, under normal conditions, could damage the windings) and gradually increase current after starting the motor (in other words, start or stop the motor) and offer overload safety.
- What is a magnetic starter?
A magnetic starter is a device designed to provide a safe starting mechanism for heavy-duty electric motors. It comprises a contactor as a necessary component, as well as power-cut off, under-voltage, and overload protection.
- What are primary and secondary cells?
The primary cell is a non-rechargeable battery that can never be recharged. They are disposable and cannot be utilised once completely charged. They are typically found in toys, handheld devices, and remote controls, among other things.
The secondary cell is a rechargeable battery that may be recharged numerous times (depends on its life cycle). Their initial cost is higher than that of the primary cell. They are commonly found in telephones, autos, generators, and other electronic devices.
- Define Circuit Breaker?
A circuit breaker, like a fuse, is a protective electromechanical device used to control the flow of current. In the event of a fault condition such as a short circuit or overload, it automatically breaks the circuit. It can also break the circuit manually. It is an ON-load and OFF-load device, which means it can operate in both ON and OFF supply conditions.
- What is the difference between a generator and an alternator?
Both a generator and an alternator convert mechanical energy to electrical energy. The main distinction is that the generator has a stationary magnetic field, whereas the armature rotates within a fixed magnetic field. The magnetic field rotates inside the conductor windings of an alternator (stator). As a result, phase conductors serve as the alternator’s stationary component.
- What do the different colours on wires mean?
The varying colours of the wires are used to indicate phase. They represent different phases, as well as the neutral and earth cables. The colour code may vary from country to country, but the earth wire is commonly green with yellow stripes.
- What kind of compression (crimped) connectors are available for control wiring?
Insulated ring tongue, locking fork tongue, flanged fork tongue and pin type
- What is the difference between an electronic regulator and a conventional electrical rheostat regulator for fans?
The difference between an electronic and a conventional electrical regulator is that power losses are lower in electronic regulators because as the speed decreases, the electronic regulator provides the power required for that speed, whereas in conventional rheostats, power wastage is constant across all speeds and no power is saved. In electronic regulators, TRIAC is used for speed control by confirming angle speed and controlling it, but in rheostatic regulators, control resistance is decreased in steps to achieve speed control.
- Name the components of earthing system?
- Earth conductor
- Earth lead
- Earth electrode
- What’s the difference between ‘Neutral’ and ‘Earth’?
Neutral – It is utilised as a return path in alternating current systems to complete the circuit for low current.
Earth is employed for safety reasons. The earthing cable is directly connected to the actual earth, allowing fault current to go directly to the earth without injuring the person.
- What are your thoughts on International Standards such as IEEE, IEC, NEMA, NFPA, and API?
- IEEE is an abbreviation for the Institute of Electrical and Electronics Engineers.
- The International Electrotechnical Commission is abbreviated as IEC.
- NEMA is an acronym that stands for National Electrical Manufacturers Association.
- The National Fire Protection Association is abbreviated as NFPA.
- API is an abbreviation for the American Petroleum Institute.
- What are the primary points to look for during the Motor Installation inspection?
The following are the critical issues to consider during motor installation:
- Examine the rated voltage, current, speed, frequency, IP rating, and temperature class.
- Anti-condensation heaters were fitted, and a continuity and IR test was performed. Examine the phase to earth resistance (wherever applicable).
- Check that the Current Transformer (CT) installation and connections are correct. (When applicable).
- Check the stator winding connection to ensure it is in accordance with the nameplate/data sheet.
- Examine the auxiliary terminal boxes (space heaters, bearing/winding temperature/vibration, etc)
